Leather-skiving machine.



No. s7|,o72. Patentd Air'. 2, IBM.

J. n. SCOTT.

LEATHER SKIVING MACHINE.

(Application filed Nov. 16, 1899.:

2 Sheets -Sheef pNo Modal.)

Hun- M lll llll'" WITNESSES:

INVENTOE? Jud Ska 6472 5601? ATTORNEYS 1m: Nonms PETERS co, wm'u-uwovv vusuwsrnu u u No. 67I,072. Patented Apr. 2; 190i.

J. R. SCOTT.

LEATHER SKIVING MACHINE.

(Application filed Nov. 16. 1899.

(No Model.) 2 Sheets-Sheet 2.

INVENTOR Jaco kufierzfcol'l' 'ATTORNEYS ATENT FFICE.

JACOB RUPERT SCOTT, OF NEW YORK, N. Y., ASSIGNOR TO THE UNITED SHOE MACHINERY COMPANY, OF NEW JERSEY.

LEATHER-SKIVING MACHINE.

SFECIFIGATION formingpart of Letters Patent No. 671,072, dated April 2, 1901.

Original application filed September 7, 1399, Serial No. 729,771. Divided and this application filed November 16, 1899. Serial No. 737,224. (No model.)

ating presser-roller, dilliculty has been expe rienced in forcing the blank into the die and firmly seating and holding it therein during the skiving operation. This difficulty principally due to the fact that the edges of the blank are gripped between the surfaces of the die and pressure-roller and the central portion forced into the die-cavity by stretching the blank. As a result of such construction the pressure-roller often fails to force the blank to the bottom of the die. Moreover, as the blank is stretched in being forced into the die it has a tendency to resume its original fiat condition'immediately it is released from the action of the pressure-roller, and consequently rises from the die during its passage to the skiving-knife, which is necessarilysituated at one side of the line of contact of the presstu'e-roller.

The object of my invention is to provide a machine comprising a die and a cooperating pressure'roller which shall be free from the defects above noted; and to this end it consists in providing means for moving a portion of the engaging surface of the pressure-roller endwise as the blank passes thereunder, whereby the edges of the blank will be moved toward each other and the center of the blank thereby slackened to allow the blank to bend in conforming to the die without being stretched or put under tension. By providing means for moving the edges of the blank toward each other the blank can be forced to the bottom of the die, and as the blank is not stretched in such operation it has practically no tendency to resume its original flat condition in passing to the skiving-knife and is presented thereto so as to produce an article of the exact shape of the die. The operation of moving the edges of the blank toward each other acts to bend the blank into the die-cavity, in which it'is held by the engagement of the pressure-roller with the edges of the blank, and such operation may be relied upon for forcing the blank into the die. To insure the forcing of the blank to the bottom of the die, I may, however, and preferably do, provide a flexible pressure-roller adapted to bulge and force the blank into the die, and such a roller constitutes a feature of my invention.

Other features of my invention consist in the devices and combinations of devices hereinafter described, and defined in the claims.

In carrying out my invention I provide a pressure-roller a portion of the surface of which is endwise movable, and preferably construct such roller of yielding or compressible material and provide means for moving such surface endwise and for com pressing the roller to cause it to bulge toward the die.

In the accompanying drawings, wherein is illustrated a preferred embodiment of my invention, Figure l is a front elevation of a machine embodying the same. Fig. 2 is an end elevation of the machine shown in Fig. 1.

Fig. 3 is a detail view of aclutch. Fig.4is a section alongatx, Fig. 1. Fig. 5 is a section along g y, Fig. 1. Fig. 6 is a sectional view of a gage. Fig. 7 is a sectional viewof the p ressu re-roller.

Referring to the drawings, in which like characters of reference indicate like parts, 1 designates the base of the machine,from which rises column 2, having arms or bearings o. On a shaft 4 is a loose pulley 5, having a lug or clutch member 6. The corresponding clutch member 7 is carried by collar or slide 8, feathering on the sleeve of pinion 20, turning on shaft 4. When the slide Sis moved toward the pulley 5 to bring member 7 into the path of member 6, said slide will lock the clutch to cause pulley 5 to rotate pinion 20. When the slide moves away from the pulley and the clutch is released, the pinion remains at rest, while the pulley can continue rotating.

The slide Sis shown engaged by the arms of a yoke 9, Fig. 5, having a hub portionlO, slidable on a pin 11. The hub portion 10 is connected at 12 to a lever 14, fulcrumed at 15. To this lever is connected a rod 16, having a weight 17, which tends to move the rod and lever 14, with slide 8, to unlock or open the clutch. A suitably-applied spring or the like would of course be equivalent to the releasing-weight -17.

The rod 16 or its weight is connected to lever 18, 'fulcrumed at 19 and having a treadle part 18, which when depressed or stepped on will moge rod 16, with lever 14, yoke 9, and slide 8, to lock the clutch and cause pulley 5 to rotate pinion 20 on shaft 4.

The pinion 20, Fig. 5, rotates gear21, which, by gear 22, rotates gear 23. The gear-wheel 23 at its outer face or the face toward pulley 5 has a seat or recess 24. The yoke 9 has a pin 26, which when properly set or adjusted is fixed in position by a lock or set-screw 27. WVhen treadle 18 is depressed to move yoke 9 toward the pulley 5 and lock the elutch,the pin 26 is moved out of seat 24, and as the gear 23 rotates the seat 24 is carried away from pin 26. Upon treadle 18' being now released the weight 17 moves the yoke, with pin 26, back toward gear-wheel 23, but the pin striking against the outer or unbroken face of gear 23 the yoke 9 is held or prevented from moving so far as to free, the clutch until the gear 23 in its revolution has brought seat 24 back again to pin 26. The pin now slipping or dropping into seat 24, the clutch is disengaged and the machine is stopped automatically.

As seen in Fig. 4, the gear 23 or its hub or sleeve is keyed to a shaft 28, having a knob or handle 29, and to which shaft is keyed the die or die-roller 30. By removing nut 31 the shaft 28 by handle 29 can be conveniently slipped out of place, the die or gage roller 30 changed, and the shaft 28 replaced. Dies of various kinds or sizes can thus be readily inserted or removed. In Fig. 4 the shaft'28 is shown with gear 32 engaging gear 33,1nounted loosely on shaft 34 of the pressure-roller, which holds or presses the work into the die 30 as such work is fed between the roller 35 and the die. The gears 21 and 22 already named are keyed to this shaft 34, and the gears 22 and 23 engaging one another cause the die 30 and pressure-roller to rotate together for feeding the work.

The pressure-roller is so constructed and supported that a portion of the surface of the roller can be moved endwise or longitudinally of the axis. Many constructions for allowing such movement might be devised, all of which would be within the purview of this feature of my invention. A convenient construction is illustrated in Figs. 4 and 7, in which the roller is shown as composed of sections movable endwise with relation to each other. The pressure roller is also preferably arranged to bulge toward the die during the passage of the blank between the roller and the die, and in the construction shown in the drawings I accomplish this result by making one or more of the roller-sections of yielding or compressible material.

Referring to Fig. 7, the pressure-roller in addition to the section 35 also comprises the two sections 35, and this pressure-roller is made yielding or of compressible material, such as rubber or the like. The lateral or outer sections 35 have sleeves 36. The outer parts of the sleeve 36 fit the shaft 34, and the inner parts are somewhat cone-shaped or flare toward the section 35. The gear either has its hub long enough to abut against one of the sleeves 36 or a lengthening-piece or fillingtube is slipped onto shaft 34 to fill the gap, if any, between hub of gear 33 and the adjacent sleeve 36. The gear 33 is provided with a cam or inclined face 37,'Figs. 1 and 4. A roller 38, mounted on arm 39, bears against cam 37, and this arm or its hub 40, when set or adjusted 'oii pin or shaft 41, can be fixed in position by screw or lock 42. As the gear is rotated and the high part of cam 37 is brought against roller 38 this cam presses against or slides one of the sleeves 36 on shaft 34, so that this sleeve is slid toward the other sleeve or toward the side gage 44. The flexible roller or rubber is thus automatically compressed and caused to bulge toward the die 30. This compression also causes the section 35 to bulge or enter the flares or coneshaped parts of sleeves 36, which thus hold the section 35 to the shaft, and the sections 35 35 and sleeves 36 thus pressed together rotate in unison. The key on shaft 34 is shown engaging but one sleeve 36, but when the roller-sections are pressed together, as just stated, the rotation of one section is communicated to the other section, so that these sections rotate as one piece. sion and bulging of the rubber effects two objects. The endwise compression of the rubber or endwise movement of the feedroller causes the edges of the work between the rubber and the die to be approached or brought nearer to one another, so that the center part of the work is slackened or can bend or seat itself in the depression or seat in die 30. At the same time the bulging of the rubber causes the work to be firmly or neatly seated in the depression in the die 30. The work is also made to conform to the die Without any stretching action, and consequently is presented to the skivingknife while seated in the die, there being practically no tendency of the blank to leave the die in the short distance between the line of contact of the rollers and the skiving-knife.

The gear 33, with its cam 37, can rotate and slide on shaft 34. If shaft 28 is moved endwise, the gear 32 can be held against sliding or moving endwise by a bracket or hoodshaped holder 51, Figs. 1 and 2, catching over the edge of gear-wheel 32. In Fig. 2 the cam 37 is shown with a scale, by which it can be readily ascertained how said cam is set. In carrying out the invention in practice the This compreshighest part of the cam was indexed zero, and the cam can be arranged or indexed for suitable sizessay, for example, up to eleven to indicate eleven inches, or that the machine can work counters up to a size or length of eleven inches. Instead of eleven inches machines can be arranged forgreater orsmaller limits. Say, for example, a counter is to be skived six inches in length. The roller or hearing 38 is set out or away from hearing 3 far enough for its bearing-point to come into vertical plane with point 6 on the scale. As the cam 37 now rotates said cam will not strike roller 38 until its point has reached this roller and will again clear the roller as the point equidistant to 6 on the opposite side of apex zero passes the roller 38. The feed-roller 35 is thus moved endwise during the time corresponding for the feed of a six-inch counter. For other lengths of counters the roller 38 is of course correspondingly set. The counter is placed against side gage 44 and the machine is started by depressing treadle 18. After the machine has started the treadle is released, the pin 26, as already noted, holding the clutch or the machine in action until the machine has completed a revolution. Then it is stopped automatically at its starting or initial point by pin 26 slipping into seat 24 to open the clutch. The counter as it is fed through between the roller 35 and die 30 is carried past or against the knife 45 to be finished or skived. The shafts 2S and 34 are mounted in boxes, Fig. 4. Springs 47 tend to separate the boxes. By screws 48 these boxes or shafts, with their rollers 35 and 30, can be set closer together as required by the thickness of work. When set, the screws 48 can be locked by screws 49. The yoke 9, as seen in Fig. 5, clasping or sitting at opposite sides of collar 8 and its hub or slide sitting about pin 11, is firmly supported, so that pin 26 is not capable of any wabbling or motion other than that toward and from the gear 23.

The end gage 44 is shown channeled or gutter-shaped. A counter or edge of a counter slipped into this gage-channel can be moved along the same to be taken or fed between the die and feed-roller. This gage is shown with perforations 52 and 53. A rod or filler 54 being inserted into a hole 52 can be adjusted and locked therein by a screw 55, passed through a tap or hole 53. The adjusting-piece 54 being suitably set will prevent a counter being passed too far into the gagechannel. The piece 54 can be set farther in or out, as the curvature of the adjacent edge of the article varies. The article having a portion of the curved edge seated against pin 54 and the apex or highest point of said curve seated against the bottom of the channel in gage 44, the article is readily set or held in straight or proper position relative to die 30.

In addition to the adjustment by pin 54 further adj ustment can be attained by setting the gage-body 44 toward or from the centers or median line of the die and cavity-rollers 35 and 30. The roller or die is generally known as the cavity and can be deeper or shallower or variously shaped to correspond with the article to he finished. The gage 44, when held by a nut or fastening 55, Fig. 1, extended through a suitably-slotted branch of the gage 44, allows the latter to be set and fastened in any required adjustment. The die-roll 30 and feed can be suitably adjusted by the screws 48 in proper relation to the knife, as required by the article to be finished. The flexible feed 35, having the inner part bulged or forced inward by cam 37, will firmly grip the shaft 34, and the outer part of this roller bulging out will force the article to be finished into the die-roll, so that when finished the article will correspond with the die-roll.

By means of screw 48 either or both ends of the dieshaft 28, as also of the feed-roller shaft 36, can be set or adjusted so that the die and feed-roller can not only be suitably spaced, but can also be set parallel or at anv angle to one another or to the knife 45, as required, for example, if different sides of a boot or shoe counteror article are to be variously skived.

The die-shaft 28, stated, can be removed from the machine; but such removal can be effected without removing the gear 23, which can remain seated in its box or bearing 46 as the shaft 28 is removed and replaced. Like- Wise the feed-shaft 34 can be removed without removing its driving-gear 21.

While in the machine above described the die is carried on a roller and the pressureroller coacts with the die-roller in feeding the blank to the skiving-knife, it is to be understood that it is not essential to my invention, considered in its broadest aspects, that the die should be carried by a roller or that either the die or the pressure-rollershould perform any feeding function.

It is also to be understood that my invention is not limited to the details of construction shown and described, but may be embodied in many different constructions without. departing from the spirit thereof.

The clutch mechanism herein disclosed is not claimed herein, but forms the subject matter of my pending application, Serial No. 729,771, filed September 7, 1899.

hat I claim as new, and desire to secure by Letters Patent, is

1. A leather-skiviug machine, having, in combination, a die, a flexible pressure-roller, and means for bulging or pressing the flexible roller toward the die, substantially as described.

2. A leather-skiving machine, having, in combination, a die-roller, a flexible pressureroller and mechanism for automatically bulging or pressing the flexible roller toward the die-roller, substantially as described.

3. A leather-skiving machine, having, in combination, a die, a pressure-roller having a portion of its surface movable endwise, and means for so moving such portion, substantially as described.

4.. A leather-skiving machine, having, in combination, a die-roller, a pressure-roller comprising a plurality of parts and means for imparting a relative endwise movement to said parts, substantially as described.

5. A leather-skiving machine, having, in combination, a die roller and a flexible roller adapted to have Work pass therebetween, the said flexible roller being endwise compressible to carry one edge of the work toward the other edge, and said roller being adapted to bulge to carry or force the work into the die of the other roller, substantially as described.

6. A leather-skiviug machine, having, in combination, a die-roller, a flexible roller, and a cam for compressing or bulging the flexible roller, substantially as described.

7. A leather-skiving machine, having, in combination, a die-roller, a flexible roller, a cam for compressing or bulging the flexible roller, and a bearing face or roller 38 for the cam, substantially as described.

8. A leather-skiving machine, having, in combination, a die-roller, a pressure-roller comprising a plurality of parts, a cam for imparting a relative endwise movement to said parts, and a bearing 38 for the cam, said hearing being made adjustable so as to be set for varying work, substantially as described.

9. A leather-skiving machine, having, in combination, a die-roller, a pressure-roller comprising a plurality of parts, a cam for imparting a relative endwise movement to said parts, an adjustable bearing-face 38 for the cam, and a driving-gear for the cam, substantially as described.

10. A leather-skiving machine, having, in combination, a die-roller, a pressure-roller comprising a plurality of parts, and a cam driven by the die-roller for imparting a rela-' tive endwise movement to the parts of the pressure-roller, substantially as described.

11. A leather-skiving machine, having, in combination, a die-roller, a shaft therefor, a pressure-roller comprising a plurality of parts, a shaft therefor, a cam on the pressure-roller shaft for imparting a relative endwise movement to the parts of the roller, and a driving-gear for said cam, substantially as described.

12. A leather-skiving machine, having, in combination, a die-roller, a shaft therefor, a pressure-roller comprising a plurality of parts, a shaft therefor, a cam mounted loosely on the pressure-roller shaft for imparting a relative endwise movement to the parts of the roller and a gear on the die-roller shaft for actuating said cam, substantially as described.

13. A leather-skiving machine, having, in

combination, a die-roller, a pressure-roller, a shaft therefor, a key for locking the pressureroller to its shaft and a cam on the pressureroller shaft, said key being free from the cam to allow the latter to move independently of the shaft, substantially as described.

let. A leather-skiving machine, having, in combination, a die-roller, a flexible roller and sleeves 36 for the flexible roller, said sleeves being spaced or separated to allow compression of the flexible roller, substantially as described.

15. A leat-her-skiving machine, having, in combination, die and pressure-roller shafts and a driving-gear 23 for the die-shaft, said die-shaft being continuous and removable while leaving its gear in place, substantially as described.

16. A leather-skiving machine, having, in combination, die and pressure-roller shafts and a gear 21 for the pressure-roller shaft, said shaft being continuous and removable while leaving its gear in place, substantially as described.

17. A leathenskiving machine, having, in combination, a die-roller, a pressiu'e-roller, a longitudinally-movable die-shaft 28, a gear 32 for the shaft and a bracket or hood to hold the gear when the shaft is moved, substantially as described.

18. A leather-skiving machine, having, in combination, a die-roller, a pressure-roller, a gage having a channel and an adjustable guide-pin 54 made to project into the gagechannel, substantially as described.

19. A leather-skiving machine, having, in combination, a die-roller, a pressure-roller, a channel-guide having perforations leading to the channel, and a filler or pin and set'screw engaging in the perforations for causing the articles to be properly seated in the channel, substantially as described.

20. A leather-skiving machine, having, in combination, a die and a pressure-roller, said pressure-roller comprising a central and lateral or outer sections and sleeves for the lateral sections, said sleeves being flared or cone-shaped toward the central section, said central section being shaped to bulge or press into said flares, substantially as described.

21. A leather-skiving machine, having, in combination, a dieroller and flexible pressure-roller, a shaft for the pressure-roller and means for compressing the pressure-roller to cause it to bulge toward its shaft and toward the die-roller, substantially as described.

In testimony whereof I have hereunto set my hand in the presence of two subscribing witnesses.

JACOB RUPERT SCOTT.

Witnesses:

W. C. HAUFF, E. F. KASTENHUBER.

lOC 

